What do you guys think of UFO's?

[Ghieri]

I only have to assume it correct as far as it is practical.

It IS practical. We use it in everything and it works.

While it is arrogant to say that we have a perfect understanding, you have yet to provide a viable alternative.

We have to work within the boundaries of what we understand otherwise we are making unfounded assumptions. That's how we used to work, we don't do that anymore.